i want to be alone, leave me alone, time to myself.
How do you say "I am tired and I don't want to be bothered"?
Estoy cansada y no quiero estar molestada.
Quiero estar (quedar) sola, déjame sola, tiempo (un rato) para mí misma.
Oops! After all of that, you asked how do you...? I thought you said how do I...?
Well, all of my adjectives would end on o rather than a. cansado, molestado, solo, mismo.